This is the bios chip on ASUS ROG STRIX B450-F GAMING mainboard.

This should be the data sheet of this family of SPI flash chips.

I tried to connect it to a raspberry pi-4 with SOIC test clip and 1,8v power supply and logic-level converter,
but flashrom v0.9.9-r1954 on Linux 4.19.105-v8-28 (aarch64)
only found:
flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=1000
Found Generic flash chip "unknown SPI chip (RDID)" (0 kB, SPI) on linux_spi.
Probing for Generic unknown SPI chip (REMS), 0 kB: REMS returned 0xc0 0x01. probe_spi_rems: id1 0xc0, id2 0x1
Found Generic flash chip "unknown SPI chip (RDID)" (0 kB, SPI).
This flash part has status NOT WORKING for operations: PROBE READ ERASE WRITE

I saw in newest version
this chip is still not listed. So probably also not supported in newest development version.